Linux 2.6.38 has been released. This release includes support for a automatic process grouping ("the patch that does wonders" ), significant scalability improvements in the VFS, Btrfs LZO compression and read-only snapshots, support for the B.A.T.M.A.N. mesh protocol (which helps to provide network connectivity in the presence of natural disasters, military conflicts or Internet censorship), transparent Huge Page support (without using hugetblfs), support for the AMD Fusion APUs, many drivers and other changes. You can read the full changelog as well.